-sis - Wiktionary

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See also: Appendix:Variations of "sis"

English

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Etymology

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Ultimately from Ancient Greek -σις (-sis, “forms noun of action”), often via Latin or French. Identical in meaning with Latin -entia, English -ing.

Suffix

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-sis (plural -ses)

  1. forming nouns of action or process catharsis, dialysis, diagnosis, crisis
  2. (medicine) forming nouns of condition psoriasis, sepsis, tuberculosis, psychosis
  3. forming additional nouns basis, oasis, thesis, stasis

Usage notes

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Not very productive: primarily used for borrowed terms from Ancient Greek, though there are also modern coinages based on Ancient Greek roots.

Derived terms

[edit] English terms suffixed with -sis apotheosis exulansis hysterosis merisis neurosis

Anagrams

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  • ISS, SSI

Latin

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Suffix

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-sīs

  1. dative/ablative masculine/feminine/neuter plural of -sus

Plains Cree

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Etymology

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Inherited from Proto-Algonquian *-sehs.

Suffix

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-sis (Syllabics -ᓯᐢ)

  1. alternative form of -is

Spanish

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Suffix

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-sis f (noun-forming suffix, plural -sises)

  1. -sis

Derived terms

[edit] Spanish terms suffixed with -sis antracosis artrosis escoliosis giardiasis hiperhidrosis neurosis psicosis psoriasis zoonosis

Further reading

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  • “-sis”, in Diccionario de la lengua española [Dictionary of the Spanish Language] (in Spanish), online version 23.8.1, Royal Spanish Academy [Spanish: Real Academia Española], 15 December 2025

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